Whoever solves the scarce resource holds the pricing power. The scarce resource keeps changing, and commercial organizations are slow to follow it.
A data center is a machine for turning a constrained resource into computation. The interesting question in any given decade is which resource is actually constrained, because that is where the profit pool sits. And the answer has changed roughly every fifteen years for as long as there have been data centers.
In the mainframe era the constraint was physical: conditioned floor space, raised floor, machine-room real estate, and the enormous capital cost of the box that sat on it. Through the eighties and nineties it became processor performance, and the margin moved to whoever could put more instructions per second in front of a customer. In the 2000s it became bandwidth and interconnect. That is the era I came up in, and it is worth remembering how completely it dominated the conversation: dense wavelength division multiplexing and intelligent optical switching existed because moving data between places was the wall everything else hit. Then virtualization and utilization had their turn. Now the constraint is power and heat, and it is not close.
Each of those transitions relocated the profit pool, and the companies with pricing power in one era rarely held it in the next. Not because they got worse at what they did. Because the constraint moved out from under a commercial organization that had been carefully optimized for the previous one. Sales coverage, partner programs, engineering investment and compensation plans all get built around the thing that was scarce when they were designed, and they are the slowest part of a company to change.
The clearest evidence that the current constraint is thermal and electrical is not a market forecast. It is what large, diversified industrials have been willing to pay. Eaton acquired Boyd’s thermal business in a deal valued around $9.5 billion, closing in March 2026. Ecolab acquired CoolIT for roughly $4.75 billion. Schneider took Motivair, Trane took LiquidStack, Daikin took Chilldyne, Flex took JetCool. Inside about three years, nearly every independent direct-liquid-cooling specialist of any consequence was bought. Nobody pays those multiples for a component line. They pay them for a position at the constraint, and they pay them when they have concluded the position will not be available later.
Market sizing corroborates without proving. Dell’Oro has the data center liquid cooling market reaching roughly $7 billion in manufacturer revenue by 2029, from something on the order of $2 billion as of early 2026. A market on that trajectory, with no vendor holding a commanding position in it, is a market where position is still purchasable, which is exactly the condition that produces an acquisition wave.
The more useful question is where the constraint goes next, and the direction is consistent: down the stack, toward the package. It has already moved from the room to the row to the rack, and it is now moving from the rack to the board and from the board to the package and the die. Each step down shortens the list of people who can solve it and raises what solving it is worth. It also changes who the buyer is. Room-level problems are bought by facilities and operations. Package-level problems are decided by thermal and package architects, eighteen months before anyone issues a purchase order, and they are not reachable through the channels that worked at the room level.
That gives any company in this market three questions worth asking at every planning cycle, and they are more uncomfortable than they look.
Which layer of the stack are you selling into, and is it where the constraint will be in twenty-four months? Plenty of companies are selling competently into the layer where the constraint used to be, and reporting the resulting margin compression as a pricing problem.
Is your differentiation a property of the current constraint or the previous one? Broad coverage, service footprint and integration breadth were decisive when the problem was the room. They are much less decisive when the problem is a temperature gradient across a substrate.
And who has pricing power in your value chain today? If the answer is the layer above you, you are a supplier to the constraint rather than the holder of it, and no amount of sales effort changes that. Changing it requires owning a different problem.
The argument against. The obvious counter is that constraints get relieved rather than relocated. If eight-hundred-volt DC distribution, better microchannel cold plate design and warm-water operation together buy the industry another five years of headroom at the rack level, then the thermal window stays open longer and the shift to the package slips. That is a real possibility and anyone selling on an inflection should hold an explicit view on what would delay it. The honest version of this thesis is not that the package layer is inevitable next year. It is that the constraint is moving, the direction is legible, and a commercial organization built for the last position will be late to the next one whether it arrives in 2028 or 2033.
The version of this idea that is worth anything is not a slide with four eras on it. It is the habit of asking, every planning cycle, whether the thing you are best at is still the thing your customers cannot get enough of.